<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片 -->
    <el-card>
      <el-alert
        show-icon
        title="注意:只允许为第三级设置相关参数"
        type="warning"
        :closable="false"
      >
      </el-alert>

      <!-- 商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>请选择商品分类:</span>
          <!-- 商品分类的级联 -->
          <el-cascader
            v-model="selectedCateKeys"
            :options="catelist"
            :props="{ expandTrigger: 'hover', ...cateProps }"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数面板 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
            >添加参数</el-button
          >
          <!-- 动态属性表格 -->
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="index"></el-table-column>
            <!-- 展开行 -->

            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag
                  closable
                  v-for="(item, index) in scope.row.attr_vals"
                  :key="index"
                  @close="handleClosed(index, scope.row)"
                >
                  {{ item }}</el-tag
                >
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性面板 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="showAddDialogVisible"
            >添加属性</el-button
          >
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <el-table-column type="index"></el-table-column>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <el-table-column type="expand">
                <template slot-scope="scope">
                  <!-- 循环渲染Tag标签 -->
                  <el-tag
                    closable
                    v-for="(item, index) in scope.row.attr_vals"
                    :key="index"
                    @close="handleClosed(index, scope.row)"
                  >
                    {{ item }}</el-tag
                  >
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <el-button
                    v-else
                    class="button-new-tag"
                    size="small"
                    @click="showInput(scope.row)"
                    >+ New Tag</el-button
                  >
                </template>
              </el-table-column>
            </el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

        <!-- 级联选择框 -->
      </el-tabs>
    </el-card>
    <!-- 添加参数的对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addFormClosed"
    >
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        lable-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input></el-form-item
      ></el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editFormClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        lable-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input></el-form-item
      ></el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      catelist: [],
      //级联选择框配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
      },
      selectedCateKeys: [],
      // 被激活的页签名称 默认
      activeName: 'many',
      //静态属性数据
      onlyTableData: [],
      //动态参数数据
      manyTableData: [],

      addDialogVisible: false,
      // 添加参数的表单数据对象
      addForm: {
        attr_name: '',
      },
      // 验证规则对象
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
        ],
      },
      // 编辑对话框默认
      editDialogVisible: false,
      // 编辑表单的数据对象
      editForm: {
        attr_name: '',
      },
      // 编辑rules
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
        ],
      },
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }

      this.catelist = res.data
      console.log(this.catelist)
    },
    // 级联选择框变化触发
    handleChange() {
      this.getParamsData()
    },
    //获取参数的数据列表
    async getParamsData() {
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      // 证明是三级分类
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName },
        }
      )
      if (res.meta.status !== 200) {
        return this.$meesage.error('获取参数列表失败')
      }
      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      console.log(res.data)

      if (this.activeName == 'many') {
        this.manyTableData = res.data
      }
      this.onlyTableData = res.data
    },
    // tab点击事件函数
    handleTabClick() {
      console.log(this.activeName)
      this.getParamsData()
    },
    // 展示添加对话框
    showAddDialogVisible() {
      this.addDialogVisible = true
    },
    // 监听添加对话框关闭
    addFormClosed() {
      this.$refs.addFormRef.resetFields()
    },
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
          }
        )
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败!')
        }
        this.getParamsData()
        // console.log(res)
        this.addDialogVisible = false
      })
    },
    // 展示编辑表单
    async showEditDialog(attr_id) {
      //查询当前参数的信息
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${attr_id}`,
        {
          params: { attr_sel: this.activeName },
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 关闭时清空编辑表单
    editFormClosed() {
      this.$refs.editFormRef.resetFields()
    },
    //点击修改
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeName,
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败')
        }
        this.$message.success('修改成功!')
        this.getParamsData()
        this.editDialogVisible = false
      })
    },
    async saveEditData() {},
    async removeParams(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该分类, 是否继续?',
        '删除',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除操作!')
      }
      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${id}`
      )
      // console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败!')
      }
      this.$message.success('删除参数成功')
      this.getParamsData()
    },
    // 文本框失去焦点或者按了enter
    handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      // 如果有内容
      this.saveAttrVals(row)
    },
    saveAttrVals(row) {
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      const { data: res } = this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' '),
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数失败')
      }

      this.$message.success('修改参数项成功!')
    },
    showInput(row) {
      row.inputVisible = true
      // 让文本框自动获得焦点
      // $nextTick : 当页面上元素被重新渲染后,才调用
      this.$nextTick((_) => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 删除对应的tag
    handleClosed(index, row) {
      row.attr_vals.splice(index, 1)
      this.saveAttrVals()
    },
  },
  computed: {
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    },
  },
}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 10px;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
  width: 100px;
}
</style>
